受端分层特高压直流阀区保护优化策略
发布时间：2019-05-19 16:12
【摘要】：受端分层特高压直流受端高低压阀组接入不同电压等级的交流电网,为了提高设备可用率和减少在交流系统故障引起的功率损失,提出了换相失败预测控制的联动机制减小换相失败发生的概率。基于交流系统基波负序电压幅值的阀组谐波保护,在某个交流系统发生不对称故障时能退出相应阀组,保证另一阀组能继续运行。三相对称故障时利用阀组欠压保护作为后备保护。并在此基础上提出了分级多层次的保护动作策略,达到提高设备的可用率和减少功率损失的目的。理论分析和实时数字仿真(real time digital simulator,RTDS)试验验证了文中所提策略的正确性和可行性。
[Abstract]:The receiving terminal layered UHV DC receiving high and low voltage valve group is connected to the AC power grid with different voltage levels in order to improve the availability of the equipment and reduce the power loss caused by the AC system failure. The linkage mechanism of commutation failure predictive control is proposed to reduce the probability of commutation failure. The harmonic protection of valve group based on the amplitude of fundamental negative sequence voltage of AC system can exit the corresponding valve group when an asymmetric fault occurs in one AC system to ensure that the other valve group can continue to run. The undervoltage protection of valve group is used as backup protection in three-phase symmetrical fault. On this basis, a hierarchical and multi-level protection action strategy is proposed to improve the availability of the equipment and reduce the power loss. Theoretical analysis and real-time digital simulation (real time digital simulator,RTDS) experiments verify the correctness and feasibility of the proposed strategy.
【作者单位】： 南京南瑞继保电气有限公司;国家电网调度控制中心;
【基金】：国家重点研发计划项目(2016YFB0900602) 国家电网公司科技项目(SGTYHT/15-JS-191)~~
【分类号】：TM721.1
[Abstract]:The receiving terminal layered UHV DC receiving high and low voltage valve group is connected to the AC power grid with different voltage levels in order to improve the availability of the equipment and reduce the power loss caused by the AC system failure. The linkage mechanism of commutation failure predictive control is proposed to reduce the probability of commutation failure. The harmonic protection of valve group based on the amplitude of fundamental negative sequence voltage of AC system can exit the corresponding valve group when an asymmetric fault occurs in one AC system to ensure that the other valve group can continue to run. The undervoltage protection of valve group is used as backup protection in three-phase symmetrical fault. On this basis, a hierarchical and multi-level protection action strategy is proposed to improve the availability of the equipment and reduce the power loss. Theoretical analysis and real-time digital simulation (real time digital simulator,RTDS) experiments verify the correctness and feasibility of the proposed strategy.
【作者单位】： 南京南瑞继保电气有限公司;国家电网调度控制中心;
【基金】：国家重点研发计划项目(2016YFB0900602) 国家电网公司科技项目(SGTYHT/15-JS-191)~~
【分类号】：TM721.1
【参考文献】
相关期刊论文 前10条
1 王永平;卢东斌;王振曦;邹强;张庆武;;适用于分层接入的特高压直流输电控制策略[J];电力系统自动化;2016年21期
2 蒲莹;厉璇;马玉龙;李俊霖;马为民;石岩;;网侧分层接入500kV/1000kV交流电网的特高压直流系统控制保护方案[J];电网技术;2016年10期
3 汤奕;陈斌;皮景创;汪成根;刘明松;;特高压直流分层接入方式下受端交流系统接纳能力分析[J];中国电机工程学报;2016年07期
4 卢东斌;王永平;王振曦;曹冬明;;分层接入方式的特高压直流输电逆变侧最大触发延迟角控制[J];中国电机工程学报;2016年07期
5 郭龙;刘崇茹;，
本文编号：2480867
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2480867.html
